Authors
Yu A Mezentseva, T N Korotkova, K V Vybornaya, I V Vorozhko, Z M Shurova, D B Nikityuk
Published in
Voprosy pitaniia. Volume 95. Issue 3. Pages 96-106. Epub Jun 30, 2026.
Abstract
Improving athletic performance and minimizing the risk of injury due to overtraining and/or muscle damage in young tennis players is a key aspect of biomedical monitoring of their training. The purpose of the study was to evaluate biochemical markers of adaptation to physical activity and their correlations with body composition indicators in young tennis players, taking into account their dietary habits.
The study involved 59 tennis players aged 7 to 17 years. Using the AU 680 biochemical analyzer (Beckman Coulter), the level of the following biochemical markers in blood serum was determined: total protein, urea, creatinine, uric acid, glucose, cholesterol and triglycerides, the activity of creatine phosphokinase (CPK), alanine (ALT) and aspartate aminotransferase (AST); the muscle damage index (CPK/AST) and the de Ritis coefficient (AST/ALT) were calculated. Somatometric parameters were measured by anthropometry, the body composition was determined by bioimpedancemetry using the ABC-01 Medass analyzer. The analysis of the diet structure was carried out using the 24-hour dietary recall for 3 days of the survey (2 training days and 1 day off).
Creatinine levels exceeding the reference norms were revealed in 20 girls and 9 boys, in most cases observed at a younger age, which indicates a greater share of the anaerobic energy supply mechanism compared to the older age group. Serum creatine phosphokinase activity was elevated in 14 of 33 female athletes, while in boys it was within the normal range, which indicates the depletion of adaptation reserves, and therefore requires adjustment of the training schedule with a sufficient recovery period. The strongest relationship was observed for creatinine and uric acid serum level and all studied parameters of body composition (p<0.05), except for the proportion of body fat, which may be due to eating habits and the structure of the diet - optimal protein intake. The relationship was also found between blood level of triglycerides and fat mass (ρ=0.336; p<0.01) and the proportion of body fat (ρ=0.348; p<0.01), which is associated with an excess of fat in the diet.
An assessment of biochemical markers of adaptation to physical activity allowed us to determine the current state of physical performance in young tennis players. For athletes with biochemical marker deviations from reference values, additional screening tests are recommended, as well as consultation with the coaching staff regarding adjustments to the volume and intensity of physical activity, as well as the recovery period between training sessions.
PMID:
42572221
Bibliographic data and abstract were imported from PubMed on 10 Aug 2026.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 4
- Comments 0